>>4160
Gmail: buy a web domain and route it to your home email server. Then your email address can be literallyAnything@whateveraddr.xxx
Youtube: a script to youtube-dl subscribed videos straight to your NAS, this provides a better service anyway, because you can watch at 1080p 60fps or whatever resolution without any stuttering
Gdrive: NAS
Chrome: firefox, it's better anyway
Google Music: NAS
Google Books: I usually just save ebooks locally on all my devices since they're so small
Search: Duck Duck Go is great, this is the most important of all so a slightly slower search engine is more than worth it
Android: Replicant I suppose, if you have a supported device you could use multirom to run linux directly
Most of the suggestions you're getting are lateral upgrades, to be honest OP